The ISL78600 Li-ion battery manager IC supervises up to 12
series connected cells. The part provides accurate monitoring,
cell balancing and extensive system diagnostics functions. Three
cell balancing modes are incorporated: Manual Balance mode,
Timed Balance mode, and Auto Balance mode. The auto balance
mode terminates balancing functions when a charge transfer
value specified by the host microcontroller has been met.
The ISL78600 communicates to a host microcontroller via an SPI
interface and to other ISL78600 devices using a robust,
proprietary, two-wire Daisy Chain system.
The ISL78600 is offered in a 64 Ld TQFP package and is
specified for operation at a temperature range of -40°C to
+105°C.

Features
• Up to 12-cell voltage monitors, support Li-ion CoO2, Li-ion
Mn2O4, and Li-ion FePO4 chemistries
• Cell voltage measurement accuracy ±2.5mV
• 13-bit cell voltage measurement
• Pack voltage measurement accuracy ±100mV
• 14-bit pack voltage and temperature measurements
• Cell voltage scan rate of 19.5µs per cell (234µs to scan
12 cells)
• Internal and external temperature monitoring
• Up to four external temperature inputs
• Robust Daisy Chain communications system
• Integrated system diagnostics for all key internal functions
• Hardwired and communications based fault notification
• Integrated watchdog shuts down device if communication is
lost
• 7µA shutdown current: Enable = VSS
• 2Mbps SPI

Applications
• Hybrid Electric Vehicle (HEV), Plug-in Hybrid Electric Vehicle
(PHEV) and Electric Vehicle (EV) battery packs
• Electric motorcycle battery packs
• Backup battery and energy storage systems requiring high
accuracy management and monitoring
• Portable and semiportable equipment